机械力化学活化煤矸石一步制备高效混凝剂  

Mechanochemical Activated Coal Gangue One-step Preparation of High-efficiency Coagulant

作　　者：赵越 王晓岩[1] 苑文仪 张其武[3] ZHAO Yue;WANG Xiaoyan;YUAN Wenyi;ZHANG Qiwu(School of Environmental and Materials Engineering,Shanghai Polytechnic University,Shanghai 201209,China;Research Centre for WEEE Recycling,Shanghai Polytechnic University,Shanghai 201209,China;School of Resources and Environment Engineering,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]上海第二工业大学环境与材料工程学院,上海201209 [2]上海第二工业大学电子废弃物研究中心,上海201209 [3]武汉理工大学资源与环境工程学院,湖北武汉430070

出　　处：《矿产保护与利用》2020年第1期16-22,共7页Conservation and Utilization of Mineral Resources

基　　金：国家自然科学基金面上项目(21876106);上海第二工业大学研究生基金(A01GY19H010-d02)。

摘　　要：以含高岭石类煤矸石为例,提出了利用高能球磨活化工艺诱导煤矸石中高岭石晶体结构破坏,并与硫酸混合一步制备粉末铝基混凝剂,代替传统的高温活化酸碱工艺的新思路。所制备的混凝剂通过XRD、TEM、CP/MAS NMR进行表征,并对浊度、正磷酸根、五价砷、及腐殖酸等多种污染物质的去除率来对该混凝剂性能进行评价。结果表明该混凝剂具有高活性并对以上四种污染物的去除率分别达到95.95%、91.2%、89.6%和93.73%。所制备的混凝剂能够成为现有铝基混凝剂的替代品,该制备工艺简单、清洁、环保、经济,拓展了含高岭石煤矸石尾矿利用新途径,并为更廉价而又高效的混凝剂的使用提供了可能。Taking kaolinite as an example,A novel process to prepare aluminum-sulfuric acid coagulant is examined by the high-energy ball milling activation of Coal gangue,followed by co-grinding with concentrated sulfuric acid,instead of the traditional high-temperature activated acid-alkali process.The prepared coagulant is characterized by X-ray diffraction(XRD),transmission electron microscope(TEM)and nuclear magnetic resonance(CP/MAS NMR).Besides,the performance of the coagulant was evaluated by the removal rate of pollutants such as turbidity,orthophosphate,pentavalent arsenic,and humic acid.The results show that the coagulant has high activity and the removal rates of the above four pollutants reach 95.95%,91.2%,89.6%and 93.73%,respectively.The prepared coagulant can be used as a substitute for the existing aluminum-based coagulant.The preparation process is simple,clean production and environmental-friendly,in addition,it expands a new route to utilize kaolinite-rich tailings of coal mining gangue etc and provides the use of high efficient coagulant cheaper possibility.

关 键 词：清洁生产 高岭石 煤矸石 高能球磨 混凝剂 

分 类 号：X752[环境科学与工程—环境工程]